The Study Of Deformation Orderliness Of A Foundation Pit In Shenyang

Along with economic development, urban and use planning increasingly strained, development of urban underground space has become an inevitable tend. In urbanization, with the growing density of buildings increases, foundation pit security and stability issues have become increasingly prominent. Foundation pit engineering in recent years often occur in the subway tunnel has been run over or side to the new problem.Deformation of foundation pit is directly related to the safety and stability of supporting structure, foundation pit surrounding environment, but also the foundation pit engineering, smooth construction. Deformation of foundation pit is mainly includes the horizontal displacement of the support structure, foundation peripheral ground settlement, bottom heave, etc. Further research foundation pit deformation form, calculation method, the limit value of deformation and other in-depth study have become important and difficult part of foundation pit retaining structure design. In this paper, a foundation pit engineering in Shenyang measured data were analyzed on the deformation pit, combined with numerical simulation of the pit deformation factors.1.Through the analysis of the Shenyang foundation pit deformation mechanism and influence factors of envelope, which can obtains the main factors affecting the deformation of foundation pit are:design situation of foundation pit supporting structure, the location of the pit geology, excavation shape, the depth of excavation, foundation pit surrounding environment, construction scheme,etc.2.In the process of foundation pit engineering construction, construction scheme should be selected reasonably, all-round monitoring should relate to the deformation of pile retaining structure, horizontal displacement of pile top, the surrounding ground settlement, According to the monitoring data estimates of the likely problems, to prevent the occurrence of accidents.3.In the whole construction process, with the foundation pit depth increase, the level of distortion envelope is also increasing, and deformed into the pit,and the maximum displacement occurs at the top of the envelope structure.4.When using ABAQUS software to simulate., because of the parameter selection is too conservative, the data appears quite different. It can be seen that if corrected parameters be used in ABAQUS, the result will be similar to the actual construction. So that the simulation data will shows closer to the actual situation.